Belt-drum for belt-polishing machines.



Patented Mar. 6, I900.

M. J. FLAVIN, J. T. MOBIARTY & P. A. FLAVIN.

BELT DRUM FOR BELT POLISHING MACHINES.

,(Application filed Oct. 16, 1899.)

(No Model.)

IHHI In IHIIII llunnu disks being secured to the heads by bolts-andNi'rsi) STATES l ATENT Fries.

MICHAEL J FLAVIN ANDJOHN T. MORIARTY, OF CHICOPEE FALLS, AND PATRICK A.FLAVIN, OF ATHOL, MASSACHUSETTS.

BELT-DRUM. FOR BELT-POLISHING MACHINES.

SPECIFICATION forming part of Letters Patent No. 644,588, dated March 6,1900.

Application filed October 1 6 l 8 9 9.

To all whom it may concern:

Be it known that we, MICHAEL J. FLAVIN and JOHN T. MORIARTY, residing atChicopee Falls, in the county of Hampden, and PATRICK A. FLAVIN,residing at Athol, in the county of Worcester, State of Massachusetts,citizens of the United States, have invented new and useful Improvementsin Belt-Drums for Belt-Polishin g Machines, of which the following is aspecification.

This invention relates to devices for beltpolishing articlcs,andparticularly those made of wood,the object being to provide improveddevices of this class which obviate the danger of discoloring saidarticles by frictionally overheating the same in polishing them.

The invention consists in a pulley of particular construction and in itsconnection to the shaft, substantially as herein described, andsummarized in the claims.

In the drawings forming part of this specification, Figure 1 is aperspective view illustrating the frame of a polishing-machine, in whichis shown a belt-carrying drum or pulleyembodying ourinvention,thisfigure showing also a belt-driving shaft having a pulley thereon toreceive the polishing-belt and the said belt in operative position onsaid drum and pulley. Fig. 2 is a longitudinal section of said drum; andFig. 3 is a transverse section of the drum on line 3 3, Fig. 2.

Referring to the drawings, 2 indicates the belt-carrying drum, 3 thepolishing-belt, and 4 the driving-pulley of the polishing-frame, saiddriving-pulley being carried on a shaft 5, and the latter being suitablysupported on said frame (the frame per se being indicatedby 6) anddriven from any suitable motor source by a belt 7. The belt-carryingdrum 2 comprises a shaft 8, spline-connected with the hub of one of theheads 9 or 9 thereof, as shown in Figs. 2 and 3,wherein said spline isindicated by 10. The said heads 9 and 9 are of the usual ironconstruction; but each has preferably a lining-disk 12 of wood, saidnuts 13. (See Figs. 1 and 2.) The head 9 is adapted to be rigidly fixedin different positions near one end of the shaft 8 by a set-screw 14,and the head 9 is movable on the shaft toward and from the adjoining endthereof for a purpose below described, as follows: A series of rods15-say four, more or less--each extending from outside one of said heads9 or 9 into a socket inethe opposite head, are embodied in theconstruction of the frame of the drum 2, the outer end of each of saidrods being squared or otherwise formed, so that a wrench may be appliedthereto for turningit,and each havinga screwthread connection with saidfixed drum-head 9*. By the use of these rods means are provided for soadjusting the head 9 relative to the opposite head that the spacebetween the two heads is reduced orincreased for producing certaineffects relative to the cover 17 of the drum below set forth. The saiddrumcover or cylindrical 'body comprises a series of strips of canvas16, extending from head to head thereof, the ends of which are firmlysecured to the peripheries of the lining-disks 12 of the heads bynailing or otherwise. In practice said strips lie rather nearer eachother than is shown in Fig. 3, and they form a strong, but yielding,base for the below-described cover proper of the drum. The use to whichthe drum 2 is subjected requires that its cover-surface shall be ofstrong, firm, and yet flexible material, and consequently the textilefabric known as bedticking is used and is found to satisfactorily fillsaid conditions. This outer cover 17 is also firmly nailed or otherwisesecured by its ends to the peripheries of said disks 12, or the ends maybe clamped between said heads and disks, and the meeting longitudinalborders of said cover 17 are firmly stitched together. The cover 17 isthus a continuous tube extending from end to end of the pulley andforminga continnous support for a belt. Said disks 12 may be secured onthe outsides of the heads 9 and 9 if preferred, and, if desired, theends of said cover material may be secured directly to the peripheriesof the iron heads and the said disks may be omitted.

As above constructed, the drum has a firm, but yielding, cover, on whichsaid polishingbelt 3 may run, and one which may be adjusted, asdescribed, by the aforesaid rods 15 to-any desired resistance todeflection.

The polishing-belt 3 may be of any preferred construction, according tothe work it may be used on.

In using the within-described devices for polishing it will be obviousto a skilled polisher that the tension of the cover of the drum may beadjusted to any required degree by turning said rods 15, as described,to vary the separation of the heads of the drum.

It may be understood that the head 9 is generally fixed to the shaft byset-screw 14, but may be moved on the shaft by releasing the set screwand fastened in a new position, if desirable; also, that thescrewthreaded rods 15, which extend through said head 9, may beprojected more or lessthat is, screwed out or in--by turning said rodson their own axes, as is common in turning a screw out or in. The roundends of the rods turning in sockets in head 9 will press said headfarther away from head 9 when the screws are turned in the properdirection. The cover 17 and strips 16 and the draft or tension of thebelt 3, operating on the covering 17 of the pulley, will tend to drawthe head 9 firmly against the ends of rod 15, and so hold the variousparts of the pulley in a sufficiently taut relation for practicalpurposesthat is, the rods 15 act merely as spreaders and the cover ofthe pulley acts to greater or less extent in resistance to the spread orseparation of the heads.

Fig. 1 indicates a certain depression of the drum-surface caused by thedraft of the polishing-belt 3 thereon, and such depression, more orless, will be ordinarily present while the drum is in use.

Having thus described our invention, what we claim, and desire to secureby Letters Pattent of the United States, is

1. A drum for belt-polishing machines, comprising two rigid circularheads, a continuous flexible tube of textile material extending over andattached directly to the periphery of these heads, said tube extendingfrom one head to the other, and means for securing the heads at Variousdistances apart on the shaft, so that the tube may sag more or lessbetween the heads, substantially as described.

2. A drum for belt-polishing machines, com prising two rigid heads ordisks, a number of strips of flexible material extending from head tohead and secured thereto, a tube of flexible material outside suchbase-strips, and adj ustable means forholdin g the heads a greater orlesser distance apart, substantially as described.

3. Adi-um for belt-polishing machines consisting of two rigid circularheads, a continuous flexible tube having its ends securely attached tosaid heads, and a plurality of rods bearing on one head, extendinginside the tube, and adjustably connected to the other head, by whichrods the distance between the heads may be regulated, all combinedsubstantially as described 4. In a belt-polishing machine, thecombination of the shaft, a drum-head or disk fixed on said shaft, adrum-head or disk longitudinally movable on the shaft but compelled torotate therewith, means for adjusting these heads to different relativepositions, and a continuous tube of non-elastic flexible mate rialpermanently attached at its ends to both the said heads, allsubstantially as described.

5. In a belt-polishing machine, the shaft, a disk fixed thereon and adisk rotating with the shaft but movable lengthwise thereof,spreader-rods extending from one disk to the other and engaging one ofthe disks by screw engagement, so as to adjust the distance between theheads, a continuous tube of flexible material connecting the peripheriesof the disks,all combined substantially as described.

MICHAEL J. FLAVIN. JOHN T. MORIARTY. PATRICK A. FLAVIN. Witnesses:

II. A. CHAPIN, Wu. H. CHAPIN.

